As someone who's recently just started playing, and found out that, that one feature I thought would liven the game up a bit between space journeys, (getting out of your ship and stretching your legs) is not only coming, but on a grand scale, left me in much surprise. People who know this game well, know the developers well, and everything they've done, can you make an educated guess on when this supposed expansion will come? What I've found here on the forum is that they're tight lip'd on the subject, and keep repeating the same old, "it's coming" line. But are we talking next month coming? or late 2016 coming?
To be honest I've heard rumours that it is the gamecon announcement and *may* be here in time to boost December and Christmas sales. However, I have no idea how well informed/misinformed these rumours are.
From the older Dev Diaries on youtube it sounds like flying and landing around planets can be easily done in game, the problem is putting interesting stuff in there instead of having different coloured skyboxes.
If I had to do it I'd be looking at a staggered release: Walking around your own ship -> Walking around stations -> Atmosphere flight -> Landing (docking style) on planets -> Fully functional planet landing.
That gives them time to troubleshoot the walking and stuff whilst being able to have another team creating cities, mountains, hurricanes and other content for when landing finally arrives. Not sure though, all speculation.
My personal guess is that we will see passenger missions and the Dolphin/Beluga introduced this year as well as other tweaks and the paid expansions will be introduced next year.
I can't see planet landings coming in this year, I mean imagine all the meshes and textures required to create a reasonably realistic city that the procedural generation system can deal with. If you need 50 buildings to make it feel unique and each building takes the team a day to complete that'd take the whole team 2 months to complete with a 5 day working week, then think about making it all work, bugshooting, getting it to generate in the right places at the right time clipping issues, lighting etc etc.
Would be great but to do it properly I'd say next year.